Thermostat.



JOHN Mo lf. HORNER, OF GLENFIELD, PENNSYLVANIA THERMOSTA'II.

Specifieationof Letters Patent.

Patented Aug. 20, 1907.

Application filed March 5,1906. Serial No. 504,200. A

.To all whom it may concern:

Be it known that 1, JOHN McF. HORNER, a citizen of the United States,residing at Glenficld, in the county of Allegheny and State ofPennsylvania, have invent- 0d or discovered new and useful Improvementsin Thermostats, of which the following is a specification. My inventionrelates to thermostats and its object is to provide a thermostat" ofsimple construction, compact arrangement, easy and complete adjustments,

and small cost.

Another object thereof is to make a thermostat which may be constructedto serve as a gas regulator for waterheaters or as a steam trap forsteam pipes .or their equivalent, or which may be constructed to beconvertible from one use to the other.

I do not restrict myself to the uses above or hereinafter-.stated or tothe forms herein titer described, as the principles of my invention maybe variously embodied. c

Other objects will appear hereinafter.

Referring to the drawings, Figure 1 is a central longitudinal sectionthrough a selected form of my inven tion, set to serve as a regulator ofgas supply for heating water; Fig. 2, a similar view of a portion ofFig. 1, showing my invention set for use as a steam trap; and Fig. 3, across-section on line III-III of Fig. 1.

Referring to the drawings, 1 represents a box with the base 2 and body3, secured together by the screws -'l or otherwise. The body 3 isprovided with the gas outlet 5, prcierably in'line with the thermostatictube 6 which is secured in the base 2. The tube 6 has its outer endclosed, as by the cap 7, into the bottom of .which is secured the brassrod 8, extending axially through the tube (5 and through the inner endof the' same into the box 1, the rod 8 being packed or made otherwise to(i t neatly in the inner end of the tube so as to permit its free orunobstructed reciprocation therein. The base 2 has inside the box 1 thetwo posts or lever supports 9 and 10, on which are pivoted thefirst-(lass lovers ]1 and 12 respectively, the short arm of the lever 11being opposite the end of the rod 8 and its long arm cooperating withtheshort arm of the lever l2. as hereinafter described. The lever ll hasthe adjusting screw 13 therein in line with the rod 8 and forming anadjustable connection between the said lover and rod. 'lbis .screw beingopposite the outlet 5 may be adjusted thcret h rough I The base 2 of thebox 1 has secured to its exterior the valve casing 14, in which thevalve 15 adapted to the scat I6 is seated. The valve has its stem 17extended into'the box 1 through an opening in the cross-arm l8 acrossthe inlet opening in the base 2. The valve stem is prevented fromrotation by the wings Ill [it I ing corrcsponding slots in the arm 18. Aspring 20 surrounds the stem 17 between the arm l8 and the valve l5 andtends to forcethc latter on or toward its scat I6. The

l i i l l l i l 1' I i l l I l l g l l i valve-stem has its .end withinthe box 1 threaded and provided with a collar 21 adjustable along thethreads thereof. 'the long arm of the lever 12 is forked so as tostraddle the valve-stem and engage with the end of the collar. The outerend of the collar is seated in the hollow extension 22 on the box-body 3and is provided with longitudinal slots 23 (only one shown) in whichareseated thecnds of the cross-pin24 in the rod 25. The rod 25 hasthereon the fixed collar 26, seated at the inner end of the seatorcavity 27 in the outer end of the extension 22. The collar 26 iscovered with the packing 28, which is compressed by the gland 29 to makethe cavity 27 gas-tight. The outer end of the rod 25 is provided withthe slot 30 or equivalent means for rotating it. A screw cap 31 isprovided for the extension 22 and the outer end of the rod 25.

32 represents the pipe, reservoir, or other receptacle in which the tube6 is seated. As shown 32 is a water conduit, such as is connected to awater reservoir and heaten The water enters, for example, at 33 andcscapesthrough the pipe 34, after having passed along in contact withthe tube 6. I may connect the interior of the pipe or reservoir 32 withthe interior of the box as by the passage 35, placed as shown orelsewhere. I may place in said passage 35 the valve 36 which can open orclose the passage. Where the thermostat is to be used solely forregulating the flow of gas, the passage 35 and valve 36 may be omitted;and where it is to be used solely for a steam trap, the valve 36 may beomitted;

In Fig. 1, the parts being as shown in full lines, when the waterpassing through the pipe 32 is snflioiently hot, the valve-rod 8 isretracted by the expansion of the tube (5, the spring holding the valve15 against itS scal; 16 so that no gas passes, the gas being keptburning by the usual by-pass (not shown) in such a case, as ininstantaneous heaters. If the water going through pipe 32 becomes toocool, it causes the tube (3 to contract.

The shortened tube 6 pushes the rod 8 against thescrbw 13, causing thelever 11 to move the long arm of the lever 12 outwardly against thecollar 21, which pulls the valve 1 burner, through the box 1, the partsbeing as shown in dotted lines on Fig. 1. As the water becomes hotter inthe pipe 32, the expansion of the tube 6 will gradually clustthe valve15.

By removing the cap 31, 1 can raise or lower the collar 21 on thevalve-stem 17, so that; the valve may be open different distances. The.screw 13 may also be turned to assist or make the required adjustmcnt,but it is not so convenient as the rod 25, and will notbe usedordinarily, except whennecessary.

In case my invention is to be used with a burner which requires gas topass the valve 15 all the time, the collar 2i or the screw 13, or bothwill-be set so that the valve cannotclose, no matter What degree oftemperature the water has.

5 from its seat allowing the gas to pass to the In Fig. 2, the valve 36is shown open. In thisease the pipe 32 is, for example, the end of asystem of steam pipes and collectsthercin the water from the condensedsteam. The opening5 is not used or is not necessary and may be closed.What was the inlet or the gas becomes the outlet for the water: whichhas collected behind the valve 15 The condensed Water ,will cool thetube 6 and the valve 15 will he opened,

allowing the water of condensation to escape. After the water escapesthe steam or hot water in the pipe 32 will cause the valve-to close, theprinciples of operation being the same as when the thermostat controlsgas.

I claiin 1. The combination of a thermostatic tube, a valve, a levermechanism opcraiivcly connected to said tube and said valve, a rotarysleeve independent of said tube, adjustable on the valve stem andcontrolling the movements of the val e b3" the lever mechanism, achamber in which said lever mechanism is located and through which thefluid controlled by ihe valve flows, and a rotary non-traveling deviceconnected to said sleeve and permitting the reciprocation fliereof.

2. The combination of a thermostatic tube, a valve a lever mechanismoperativcly connected to said tube and said valve, a rotary sleeveindependent of said tube, ad-

justable on the valve stem and controlling the movements of the valve bythe level-mechanism, a chamber in which said lever mechanism is locatedand through which the fluid controlled by the valve ilows, a rotarynon-traveling device connccicd to said sleeve and permitting the Twinrocationfihereof, and means for packing said rotary device so asio-prevcnt the escape of iiuid from said chamber-i The combination of aThermostatic tube. a valve, a lever mechanism operafiveiy connected tosaid tube and said valve. a rotary siccvc independent of said tube,ailjustabie on the valve stem and controlling the movements of the valveby the lever mechanism, :1 chamber in which and a removable cap coveringsaid rotary device.

4. "he combinai'ion of a chamber having a. gz s inlet and ouilei, avalve in said chamber, a second chamber having a liquid inlet andoutlet, a thermostatic device. in said second chamber, a. lever conneciion between the valve and th, thermostatic device, and means forconnecting said chambers together and disconnecting them alternately,said means adapted to controhalternately the iiow of liquid from thesecond chamber through the first and the flow of gas through the firstchamber only.

5. The combination of a iherniostatic tube, a valve, and lover mechanismconnecting the some, a casing lnciosing said levers and forminga conduitfor the fluid controlled on-traveling device operable from the outsideof said casing, and a nut ad usial/le on The aive Si'cili and forming aconnection between the valve stem and the 1evcrmeci anism, the no indsaid rotary device bjc'ng connected so ihat the latter may rotate theformer.

ii. The combination or a chamber having; a gas inlet and an outlet, a.valve in said c amber, a second chamber hav in; a liquid inlet and on t,a thermostatic device in said second chamber, a lever connection betweenthe "dive and the thermostatic device, there being a communicatingpassage between said chambers,nnd a valve insaid passage for closing thesame when the thermostatic device is to control the flow of gas from thegas inlet past the valve and for opening the same when the thermostaticdevice is to control the Bow of liquid from the second chamber past thevalve;

Slgncd at iiti'sburg, Pa, this 1st day oi March 1906.

JOHN Iiici". HORNER.

Witnesses F. .Brinnnn, C. E. EGGERS.

